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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main ()
  6. {
  7.  
  8. 	int s;
  9. 	int a[98];
  10. 	int n[98];
  11. 	cin >> s;
  12.  
  13. 	for(int p=1;p<=s; p++)
  14. 	{
  15. 		cin >> n[p];
  16.  
  17. 		for(int j=0; j<n[p]; j++)
  18. 		{
  19. 			cin>>a[j];
  20. 		}
  21.  
  22. 	}
  23.  
  24. for(int i=1;i<=s; i++)
  25. {
  26. 		if(n[i]%2!=1)
  27. 		{
  28. 			cout<<"no"<<endl;
  29. 			break;
  30.  
  31. 		}
  32.  
  33.  
  34.  
  35.  
  36. 		for(int k=0; k<=n[i]; k++)
  37. 		{
  38. 		/*	 if(((a[k]!=1)  &&  (a[n[i]-1]!=1))  &&  (a[k]=a[n[i]/2])))
  39. 			{
  40.  
  41. 					cout<< "no"<<endl;
  42. 					break;
  43.  
  44. 			}
  45.  
  46. 		*/
  47.  
  48. 			if((a[k]!=1)){
  49. 				cout<< "no"<<endl;
  50. 				break;
  51. 			}
  52.  
  53.  
  54. 			if((a[n[i]-1]!=1))
  55. 			{
  56. 				cout<< "no"<<endl;
  57. 				break;
  58. 			}
  59.  
  60. 			if(a[k] != a[n[i]/2])
  61. 			{
  62. 				cout<< "no"<<endl;
  63. 				break;
  64. 			}
  65.  
  66.  
  67.  
  68.  
  69. 		//if(a[k] != (a[n[i]-(k+1)))
  70.  
  71. 		if(  a[k] != a[n[i]-k-1])
  72. 		{
  73. 			cout<<"no"<<endl;
  74. 			break;
  75.  
  76. 		}else{
  77. 			cout<<"yes"<<endl;
  78. 		}
  79.  
  80.  
  81.  
  82. 		}
  83. }
  84.  
  85. return 0;
  86. }
  87.  
Success #stdin #stdout 0s 16056KB
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https://ideone.com/hnwdc9
language:
C++14 (gcc 8.3)
created:
6 years ago
visibility:
public

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